home bbs files messages ]

Forums before death by AOL, social media and spammers... "We can't have nice things"

   comp.ai.fuzzy      Fuzzy logic... all warm and fuzzy-like      1,275 messages   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]

   Message 414 of 1,275   
   Ernst Murnleitner to All   
   Re: Weights incorporation in Fuzzy infer   
   13 Feb 05 13:19:01   
   
   From: mur@awite.de   
      
   >   
   >>>>Why not simple multiplying the (resulting) membership value(s) by the   
   >>>>wight?   
   >>>   
   >>>Because it is infeasible. Values of the membership function are not   
   >>>multiplicative in the classic fuzzy set theory.   
   >>   
      
   It is suggested in some fuzzy books. But maybe it is more logical not to   
   use a WITH operator but use an additional condition like:   
      
   if .... AND weight = full then ...   
      
   If one sets the (one) set the way, that a weight of 0.5 would be a truth   
     value of 0.5 (e.g. a triangle beginning at 0 with a truth value of 0   
   and have a maximum of 1 at 1), couldn't this be used instead of WIDTH?   
      
      
   >   
   > PROD-operator is used empirically without any justification. It isn't   
   > fuzzy. It might be called probabilistic under some, extremely rare,   
   > circumstances. Though as normally used, it is plain shamanic.   
      
   OK, you can find it in many books about fuzzy logic. But for me, this   
   operator never seemed to be logic used as "AND". As you explain: A and A   
   is not A?   
      
   However, I used it for WITH. If you want to weight a rule by e.g. 0.5:   
   Multiplication by 0.5 could be regarded as propability. Or not?   
      
      
   Greetings   
      
   Ernst   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]


(c) 1994,  bbs@darkrealms.ca